FB2 field Leave feedback On this page FB2 field See Also FB2 field Files with FB2 extension are FictionBook 2.0 eBook files that contains the structure of the eBook. It is based on XML format and contains special tags for describing each element of the book. Learn more about this file format here. See Also class FileType Was this page helpful? Not really Yes, thanks Any additional feedback you'd like to share with us? Skip Send Please tell us how we can improve this page. Skip Send Thank you for your feedback! We value your opinion. Your feedback will help us improve our documentation.